Re: [stable] [PATCH 1/2] sd: fix memory corruption by sd_read_cache_type

[Al Viro]

On Sun, Feb 26, 2006 at 08:34:10AM -0600, James Bottomley wrote:
> Well, OK, I agree allowing us to request data longer than the actual
> buffer is a problem.  However, I don't exactly see how this actually
> causes corruption, since even the initio bridge only sends 12 bytes of
> data, so we should stop with a data underrun at that point (however big
> the buffer is)

scsi_mode_sense() does memset(buffer, 0, len).  You don't need corrupting
data to come from device - 10Kb of zeroes into 512-byte kmalloc'ed buffer
will do the job just fine...
 
ACKed in that form.
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